Synopsis

Description

The symhisl driver supports the standard functions provided by the SCSA interface,
including tagged and untagged queuing, Wide, Fast, Ultra, Ultra2, and Ultra3 SCSI,
and auto request sense. The symhisl driver does not support linked commands.

CONFIGURATION

You configure the symhisl driver by defining properties in the symhisl.conf file.
Properties in the symhisl.conf file override the global SCSI settings. The
driver supports the following user-modifiable properties:

Note that the initiator ID can only be changed for symhisl
adapters that do not use the LSI Logic Boot ROM Configuration Utility.
For adapters that can use the LSI Logic Boot ROM Configuration
Utility, scsi-initiator-id has no effect.

The example above sets scsi-options for target 1 to 0x58 and all
other targets on this SCSI bus to 0x178.

The physical path name of the parent can be determined using the
/devices tree or following the link of the logical device name:

In this case, the parent is /pci@1f,4000 and the unit-address is the
number bound to the scsi@3 node.

scsi-options specified per target ID have the highest precedence, followed by
scsi-options per device type. Global scsi-options (for all symhisl instances) per bus
have the lowest precedence.

The system must be rebooted for the specified scsi-options to take effect.

Driver Capabilities

The target driver sets capabilities in the symhisl driver to enable some
driver features. The target driver can query and modify the following capabilities:
disconnect, synchronous, wide-xfer, tagged-qing, and auto-rqsense. All other capabilities are query only.

By default, tagged-qing capabilities are disabled, while disconnect, synchronous, wide-xfer, auto-rqsense, and
untagged-qing are enabled. These capabilities can only have binary values (0 or 1).

The target driver must enable tagged-qing explicitly. The untagged-qing capability is always
enabled and its value cannot be modified.

Notes

The symhisl SYM53C895A and SYM53C896 (SYM21002 and SYM22910) hardware and software support
Wide, Fast, SCSI Ultra, and Ultra2 synchronous speeds. SYM53C1010-33 and SYM53C1010-66 also
support Ultra3 synchronous speeds. The maximum SCSI bandwidth for Ultra2 transfers is
80 Mbytes/sec and 160 Mbytes/sec for Ultra3.